s1 = 72
s2 = 85
s3 = (s2-s1)/s1*100
print(f'hello,小明：今年你的成绩总共提升了：{s3:.1f}%')
print('hello,小明：今年你的成绩总共提升了：%.1f%%' % s3)
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西红柿炒巧克力
s1 = 72
s2 = 85
s3 = (s2-s1)/s1*100
print(f'hello,小明：今年你的成绩总共提升了：{s3:.1f}%')
print('hello,小明：今年你的成绩总共提升了：%.1f%%' % s3)